scholarly journals Ultracool Neighbors from 2MASS

2003 ◽  
Vol 211 ◽  
pp. 201-202
Author(s):  
Kelle L. Cruz ◽  
I. Neill Reid ◽  
P. J. Lowrance ◽  
J. Davy Kirkpatrick ◽  
J. Liebert ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Photometry ◽  
Selection Methods ◽  
Low Mass Stars ◽  
Target List ◽  
Sky Survey ◽  
Low Mass ◽  
Initial Results ◽  
Existing Data

We present initial results of an all-sky search for cool, low-mass stars and brown dwarfs within 20 pc. We have used the near-infrared photometry provided by the 2-Micron All Sky Survey (2MASS) Second Incremental Data Release to create a target list of 1793 candidates with 6 < J < 17 and J – K > 1. Follow-up observations and existing data have enabled over 85% of the sample to be classified. Spectral types and distances have been derived for over 250 nearby dwarfs, including 39 newly discovered L dwarfs. In this poster, we discuss our selection methods and present preliminary results.

scholarly journals Nature of Emission-Line Stars in the Outer Orion Region

1995 ◽  
Vol 148 ◽  
pp. 376-379
Author(s):  
Makoto Nakano ◽  
Peter J. McGregor
Keyword(s):  
Emission Line ◽  
Large Scale ◽  
Near Infrared ◽  
Infrared Photometry ◽  
Low Mass Stars ◽  
Strong Emission ◽  
Star Catalog ◽  
T Tauri ◽  
Low Mass ◽  
Cloud Complex

AbstractNear-infrared photometry is reported for 76 emission-line stars in outer regions of the Orion molecular cloud complex. Most of our program stars are selected from the Hα emission-line star catalog of the large-scale Kiso Schmidt survey of the Orion region. We confirm that most of the emission-line stars with strong emission detected in the Kiso survey are typical T Tauri stars with masses in the range 0.5 to 2 M⊙. Low mass stars have therefore continued to form in the outer parts of the Orion region, away from present day massive molecular clouds, until at least as recently as a few million year ago.

scholarly journals Multi-Wavelength High-Resolution Spectroscopy for Exoplanet Detection: Motivation, Instrumentation and First Results

Geosciences ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 289 ◽  
Author(s):  
Serena Benatti
Keyword(s):  
High Resolution ◽  
Near Infrared ◽  
Giant Planet ◽  
High Resolution Spectroscopy ◽  
M Dwarfs ◽  
Low Mass Stars ◽  
First Results ◽  
Multi Wavelength ◽  
Low Mass ◽  
Rocky Planets

Exoplanet research has shown an incessant growth since the first claim of a hot giant planet around a solar-like star in the mid-1990s. Today, the new facilities are working to spot the first habitable rocky planets around low-mass stars as a forerunner for the detection of the long-awaited Sun-Earth analog system. All the achievements in this field would not have been possible without the constant development of the technology and of new methods to detect more and more challenging planets. After the consolidation of a top-level instrumentation for high-resolution spectroscopy in the visible wavelength range, a huge effort is now dedicated to reaching the same precision and accuracy in the near-infrared. Actually, observations in this range present several advantages in the search for exoplanets around M dwarfs, known to be the most favorable targets to detect possible habitable planets. They are also characterized by intense stellar activity, which hampers planet detection, but its impact on the radial velocity modulation is mitigated in the infrared. Simultaneous observations in the visible and near-infrared ranges appear to be an even more powerful technique since they provide combined and complementary information, also useful for many other exoplanetary science cases.

scholarly journals AGB Stars in the Large Magellanic Cloud as Seen with DeNIS

1999 ◽  
Vol 190 ◽  
pp. 385-386 ◽  
Author(s):  
M. R. Cioni ◽  
H. J. Habing ◽  
C. Loup ◽  
N. Epchtein ◽  
the DeNIS Consortium
Keyword(s):  
Near Infrared ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Agb Stars ◽  
Infrared Photometry ◽  
Sky Survey ◽  
Right Ascension

We present infrared photometry of LMC stars taken from a region of 2.5° in right ascension from the DeNIS (Deep Near Infrared Southern Sky Survey) survey.

scholarly journals A LARGE-SCALE OPTICAL-NEAR-INFRARED SURVEY FOR BROWN DWARFS AND VERY LOW MASS STARS IN THE ORION OB1 ASSOCIATION

2008 ◽  
Vol 136 (1) ◽  
pp. 51-66 ◽  
Author(s):  
Juan José Downes ◽  
César Briceño ◽  
Jesús Hernández ◽  
Nuria Calvet ◽  
Lee Hartmann ◽  
...  
Keyword(s):  
Large Scale ◽  
Near Infrared ◽  
Brown Dwarfs ◽  
Low Mass Stars ◽  
Low Mass ◽  
Infrared Survey

PERIODIC VARIABILITY OF LOW-MASS STARS IN SLOAN DIGITAL SKY SURVEY STRIPE 82

2011 ◽  
Vol 731 (1) ◽  
pp. 17 ◽  
Author(s):  
A. C. Becker ◽  
J. J. Bochanski ◽  
S. L. Hawley ◽  
Ž. Ivezić ◽  
A. F. Kowalski ◽  
...  
Keyword(s):  
Sloan Digital Sky Survey ◽  
Low Mass Stars ◽  
Sky Survey ◽  
Low Mass

scholarly journals Infrared photometry of low-mass stars in Praesepe

1999 ◽  
Vol 310 (1) ◽  
pp. 87-96 ◽  
Author(s):  
S. T. Hodgkin ◽  
D. J. Pinfield ◽  
R. F. Jameson ◽  
I. A. Steele ◽  
M. R. Cossburn ◽  
...  
Keyword(s):  
Infrared Photometry ◽  
Low Mass Stars ◽  
Low Mass

scholarly journals CHARACTERIZATION OF LOW-MASS, WIDE-SEPARATION SUBSTELLAR COMPANIONS TO STARS IN UPPER SCORPIUS: NEAR-INFRARED PHOTOMETRY AND SPECTROSCOPY

2015 ◽  
Vol 802 (1) ◽  
pp. 61 ◽  
Author(s):  
François-René Lachapelle ◽  
David Lafrenière ◽  
Jonathan Gagné ◽  
Ray Jayawardhana ◽  
Markus Janson ◽  
...  
Keyword(s):  
Near Infrared ◽  
Infrared Photometry ◽  
Low Mass ◽  
Substellar Companions

scholarly journals Radio Star Candidates from FIRST and 2MASS Databases

2008 ◽  
Vol 4 (S252) ◽  
pp. 129-130
Author(s):  
Yanxia Zhang ◽  
Yongheng Zhao
Keyword(s):  
Principal Component Analysis ◽  
Near Infrared ◽  
Principal Component ◽  
Component Analysis ◽  
Infrared Band ◽  
Source Database ◽  
Sky Survey ◽  
Radio Band ◽  
Radio Stars

AbstractWe positionally cross-identified FIRST (the Faint Images of the Radio Sky at Twenty centimeters) catalogue with 2MASS (the Two Micron All Sky Survey) pointed-source database and collected the data from radio band and near infrared band. Then the data were cross-matched with the Véron-Cetty & Véron 2006 catalog and the Tycho-2 catalog, respectively. Therefore the known samples of quasars and stars are obtained. We applied principal component analysis (PCA) on the known sample. The overall sample may be projected in the principal component space. From the space, we can easily locate the area that radio stars occupy, and select out radio star candidates. With the follow-up observation of these candidates, the properties of radio stars may be studied.

scholarly journals Determining the Physical Properties of Very-Low-Mass Stars and Brown Dwarfs in the Near-Infrared

2009 ◽  
Author(s):  
Emily L. Rice ◽  
Travis S. Barman ◽  
Ian S. McLean ◽  
L. Prato ◽  
J. Davy Kirkpatrick ◽  
...  
Keyword(s):  
Physical Properties ◽  
Near Infrared ◽  
Brown Dwarfs ◽  
Low Mass Stars ◽  
Low Mass

scholarly journals Mass-Luminosity Relations of Very Low Mass Stars

2003 ◽  
Vol 211 ◽  
pp. 413-416 ◽  
Author(s):  
D. Ségransan ◽  
X. Delfosse ◽  
T. Forveille ◽  
J.L. Beuzit ◽  
C. Perrier ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Main Sequence ◽  
Near Infrared ◽  
Radial Velocities ◽  
Low Mass Stars ◽  
Multiple Stars ◽  
Low Mass

We present new accurate masses at the bottom of the main sequence as well as an improved empirical mass-luminosity relation for very low mass stars in the visible and near infrared. Masses were obtained by combining very accurate radial velocities and adaptive optics images of multiple stars obtained at different orbital phases.

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